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- /* SPDX-License-Identifier: GPL-2.0-or-later */
- /*
- * ocfs2_buffer_head.h
- *
- * Buffer cache handling functions defined
- *
- * Copyright (C) 2002, 2004 Oracle. All rights reserved.
- */
- #ifndef OCFS2_BUFFER_HEAD_IO_H
- #define OCFS2_BUFFER_HEAD_IO_H
- #include <linux/buffer_head.h>
- int ocfs2_write_block(struct ocfs2_super *osb,
- struct buffer_head *bh,
- struct ocfs2_caching_info *ci);
- int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
- unsigned int nr, struct buffer_head *bhs[]);
- /*
- * If not NULL, validate() will be called on a buffer that is freshly
- * read from disk. It will not be called if the buffer was in cache.
- * Note that if validate() is being used for this buffer, it needs to
- * be set even for a READAHEAD call, as it marks the buffer for later
- * validation.
- */
- int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr,
- struct buffer_head *bhs[], int flags,
- int (*validate)(struct super_block *sb,
- struct buffer_head *bh));
- int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
- struct buffer_head *bh);
- #define OCFS2_BH_IGNORE_CACHE 1
- #define OCFS2_BH_READAHEAD 8
- static inline int ocfs2_read_block(struct ocfs2_caching_info *ci, u64 off,
- struct buffer_head **bh,
- int (*validate)(struct super_block *sb,
- struct buffer_head *bh))
- {
- int status = 0;
- if (bh == NULL) {
- printk("ocfs2: bh == NULL\n");
- status = -EINVAL;
- goto bail;
- }
- status = ocfs2_read_blocks(ci, off, 1, bh, 0, validate);
- bail:
- return status;
- }
- #endif /* OCFS2_BUFFER_HEAD_IO_H */
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